static void
BallIterator(cpBody *body, cpArbiter *arb, int *count)
{
// body is the body we are iterating the arbiters for.
// CP_ARBITER_GET_*() in an arbiter iterator always returns the body/shape for the iterated body first.
CP_ARBITER_GET_SHAPES(arb, ball, other);
ChipmunkDebugDrawBB(cpShapeGetBB(other), RGBAColor(1, 0, 0, 1));
(*count)++;
}
static void
BallIterator(cpBody *body, cpArbiter *arb, int *count)
{
// body is the body we are iterating the arbiters for.
// CP_ARBITER_GET_*() in an arbiter iterator always returns the body/shape for the iterated body first.
CP_ARBITER_GET_SHAPES(arb, ball, other);
// Grab the bounding box, expand it slightly (for visibility) and draw it.
cpBB bb = cpShapeGetBB(other);
bb.l -= 5.0;
bb.b -= 5.0;
bb.r += 5.0;
bb.t += 5.0;
ChipmunkDebugDrawBB(bb, RGBAColor(1, 0, 0, 1));
(*count)++;
}
static void
draw(void)
{
ChipmunkDemoDefaultDrawImpl();
cpVect start = QUERY_START;
cpVect end = ChipmunkDemoMouse;
ChipmunkDebugDrawSegment(start, end, RGBAColor(0,1,0,1));
ChipmunkDemoPrintString("Query: Dist(%f) Point%s, ", cpvdist(start, end), cpvstr(end));
cpSegmentQueryInfo segInfo = {};
if(cpSpaceSegmentQueryFirst(space, start, end, CP_ALL_LAYERS, CP_NO_GROUP, &segInfo)){
cpVect point = cpSegmentQueryHitPoint(start, end, segInfo);
// Draw red over the occluded part of the query
ChipmunkDebugDrawSegment(point, end, RGBAColor(1,0,0,1));
// Draw a little blue surface normal
ChipmunkDebugDrawSegment(point, cpvadd(point, cpvmult(segInfo.n, 16)), RGBAColor(0,0,1,1));
// Draw a little red dot on the hit point.
ChipmunkDebugDrawPoints(3, 1, &point, RGBAColor(1,0,0,1));
ChipmunkDemoPrintString("Segment Query: Dist(%f) Normal%s", cpSegmentQueryHitDist(start, end, segInfo), cpvstr(segInfo.n));
} else {
ChipmunkDemoPrintString("Segment Query (None)");
}
cpNearestPointQueryInfo nearestInfo = {};
cpSpaceNearestPointQueryNearest(space, ChipmunkDemoMouse, 100.0, CP_ALL_LAYERS, CP_NO_GROUP, &nearestInfo);
if(nearestInfo.shape){
// Draw a grey line to the closest shape.
ChipmunkDebugDrawPoints(3, 1, &ChipmunkDemoMouse, RGBAColor(0.5, 0.5, 0.5, 1.0));
ChipmunkDebugDrawSegment(ChipmunkDemoMouse, nearestInfo.p, RGBAColor(0.5, 0.5, 0.5, 1.0));
// Draw a red bounding box around the shape under the mouse.
if(nearestInfo.d < 0) ChipmunkDebugDrawBB(cpShapeGetBB(nearestInfo.shape), RGBAColor(1,0,0,1));
}
}
static void
drawShapeBB(cpShape *shape, void *unused)
{
ChipmunkDebugDrawBB(shape->bb, RGBAColor(0.3f, 0.5f, 0.3f, 1.0f));
}
